Machine-drill.



To all whom it may concern Be it known* that I, .CHARLES :EUGENE COX, a citizen of the UnitedStates, and a L resident of San Pedro, in the `county of Los Angeles and State of California,"hav`e in,`

vented a new and Improved Machine-Drill, ofwhich the following is a descriptions i My invention is intended-more part1cularly as" an improvement on an invention forming the subject matter of an application, liled by me May 17, 1917, Serial Num ber 169,222` in which a` chuck carrier is equipped with a series of chucks and the carrier is movable to position any particular chuck beneath the drillfspindle; In my aforenamed machine the chucks are adapted `to be"` raised or lowered by the spindle in the engagement and disengagement *of the latter, and latches are provided oneach chuck together Iwith spring means normally tending to throw the latches to an outer poo-` sition and in engagement with" the carrier o. when the chucks are raised, whereby to sup-oV port the chuck in the raised position on the carrier when the chuck is disengaged from the spindle. i

The presentv invention relates to an imi ,l provedlatch means and to the spring-acted controlling means" therefor I as welllas the manner of effecting` the engagement between the latches and the spindle, the purpose of" the present invention being to" improve `the latch means and controlling means "with re"- spect to durability and to insure apositive operation of the latches `in an effective man` ner.

Reference is to be had to the accompanying drawings forming a part of this specifi` cationai l.. l f

Figure 1 is a partly sectionalwside"leYaf tion showing a fragment of `a chuck carrier,"

a chuck, and a portion ofthe drill spindle, said chuck and spindle embodying thepresent invention and thevpartsfbeing shown with the chuck detached from the `spindle and supported on thecarrier; o

Fig. 2 is a similar view with the chuck in the lowered position in the carrier `and engaged by the spindle;`

Fig. 3 is a plan view ofthe chuck latches in the outer position; i

Fig. 4 is an end view of the spindle.

The numeral 10 indicatesl a carrier which may be of any suitablejform,such for en ample, as shown in my aforenamed application. In the carrier is a vertically` mov- Tn sra'rns CHARLES EUGENEcoznorsnnrnnndfoatrronnrn. l

MaoHiNE-nnrnn" able chuck 11, one -chuck only being illustrated. The chuck `is, in practice, provided with any suitable means such as a socket 12 to receive a` drill w13 or other tool. i The numeral 1s indicates a portion of the` drill Patented Aug. 13,1918." Appiicationfneaaprnz,191s.1seriinazzaeio.

spindle.` The said spindle, and the chuck 11 have mating clutch elements `15, 16. Iiatchesl 17 are provided on the chuck,b"e` ing pivoted `at their lower E ends tothe chuck as1 at 18 andnadaptedto swing outward to engage the top of the carrier 10 or to swing i inwardly andl move withthe chuck within the carrier as indicated in Fig. 2.` The features referred to correspond in general with thesimilar `features in the machine disclosed in `my forenamed application.

In the present application the pivoted lower ends of :the latches 17 are accommo dated inlateral recesses 19 in the chuckand they-latches inthe inner position alie accomf` modatedzin slots 20 4inthe-chuck at the ex terior and registering slots`121` in the spindle 111 to lie within "the cylindrieal surfaces of present constructionare r adapted tofbe forced outwardly 1 lbyl` .transverse,.` radially disposed pins 22faccomm'odated in radiall recesses 23 in the `ch'uck `11 and" the reduced "shanks 125` of lthepins" have `coiled springs` the chuck and spindle. l The latches in the 241' o thereon, "said lspring-s abutting atl tlfieir` and'at their inner ends against the inner walls of the recesses 23. Thus, the tendency of the springs 241 is" to `press lthe heads I:of

outer ends against the heads of thecpins22:

rthe'pins oiitwardlyylaterally againstf the latches 17, thereby @tendingV to` throw said latches to theouterpositiongofFigi 1.

Onthe spindle'lll at lthe;lowervend isa depending axial pin"26 having an enlarged L head 2,7 atl the lower end presenting" "shoulder at the upper side of the head." In

`the lowered position of the spindle into enthe upper end of the;

iio

by moving the pins-22 inwardly to project o thel inner ends of the pins into the pocket 28 above the head 27, the action servingto compress the sprin'gs'24- as indicated in Fig. 2. -Thus, when the spindle again rises the engagement of the head 27 with thepins 22 will carry the yclutch 11 upwardly to the raised position of Figi, permitting there action of the springs 24 to force the pins outward over the top of the carrier 10 to thereby support the chuck 11 in the raised POsition. I

I would state in conclusion that whilethe illustrated example constitutes a practical embodiment of my invention, I do not limit myself strictly to the Vmechanical details herein illustrated, since manifestly the same can'be considerably varied without departure from the spirit of the invention as dened inthe appended claims.

I Having thus described Amy invention, I

claim as new, and desire to secure by Letters Patent: f

1.- In a machine drill, a' chuck carrier, a chuck vertically movable in said carrier, a drill spindle adapted for vertical movement to engage or disengage the chuck, aV latch pivoted on the chuck and swingable from an inner position to Van outer position into engagement with the carrier when said chuck is in the raised 'position and supported on the carrier and disengaged from-the spindle, a transverse spring-pressed pin on the chuck, said pin Vnormally tending to throw the latch to saidy outer position, and being movable laterally inward Vin the chuck with an inwardmovement of 'the latch, and a member v on the lower end-of thespindle adapted to be locked by said pin in the inner position of the latter.

2. In a machine drill, a chuckcarrier, a chuck vertically Y movable inl said carrier, aspindle adapted forrvertical movement to Yengage or disengage the chuck, a latch pivoted at its` lower end on the chuck to swing from an inner position to an outer position into engagement with the carrier for supporting the chuck, an axial pin on the lower end of the spindle, said pin having an enlarged head presenting a shoulder at its upper side, and a spring-pressed pin on the chuck normally tending to throw the latch to the outer position, the pin being movable by an inward movement of thc latch to engage the said head. 22 outwardly, thus throwing the latches 17 3. In a machine drill, a chuck carrier, a chuck verticallymovable in the carrier, a plurality of latches pivoted at their lower ends on the chuck to swing from an inner positionto an outer position into engagement with the carrier when the chuck is in the raised position, to thereby support the chuck on the carrier, a drill spindle above the chuck adapted to move axially to engage or disengage the chuck, said spindle and chuck having registering recesses adapted to accommodate the latches, spring-pressed pins radially disposed in the chuck and normally tending to force said latches to their outer positions, the chuck having in the upper end thereof a central pocket and the pins being movable inwardly by the lat-ches to project into said pocket when the latches are swung inwardly, and a depending member central on the spindle and adapted to be accommodated in said pocket when the spindle engages the chuck, said depending member being adapted to be engaged by the-spring-pressed pins when the latter are projected into said pocket.

4. The combination with a chuck carrier, 4

CHARLES EUGENE COX.

CPl5vf "this Patgenf may b e obtained for ve `cents each, by addressing the Commissioner of Patents. i. i Washington, D. 0. v 

